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Hardware and Internet Setup
6
CM400 High Speed Cable Modem
You can use the LEDs to verify status and connections. The following table lists and
describes each LED on the front panel of the cable modem.
Table 1. LED descriptions
LED Description
Power Green. Power is supplied to the cable modem.
Off. No power is supplied to the cable modem.
Downstream Solid green. One or more downstream channels are locked.
Blinking green. The cable modem is scanning for a downstream channel.
Off. No downstream channel is locked.
Upstream Solid green. One or more upstream channels are locked.
Blinking green. The cable modem is scanning for an upstream channel.
Off. No upstream channel is locked.
Internet Solid green. The cable modem is online.
Blinking green. The cable modem is synchronizing with the cable provider’s cable
modem termination system (CMTS).
Off. The cable modem is offline.
Ethernet Green. A device is connected to the Ethernet port and powered on.
Off. No device is connected to the Ethernet port.
Back Panel
The back panel provides the connections and button shown the following figure.
Power adapter input
LAN Gigabit Ethernet port
Coaxial cable connector
Reset button
Figure 3. Cable modem back panel
Note: The Internet LED is also referred to as the Online LED.
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